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The method for recognizing perfect graphs if flawed. Consider the following sage function:
```
def f(n):
c= 0
for g in graphs.nauty_geng(str(n)):
if g.is_perfect():
c+=1…
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### Bug Description
Tried playing a song using ?play and got this long ass error message. I did change stuff in the config, will provide that.
### Steps to Reproduce
Use the play command
### Expec…
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I added the following roles: arxiv, oeis, doi, mathscinet.
**Apply:** [attachment: trac_14011-Sphinx_roles-fh.patch](https://github.com/sagemath/sage-prod/files/10656999/trac_14011-Sphinx_roles-fh.…
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With `SageMath version 9.2.beta2, Release Date: 2020-06-26`, the command
```
sage -t --optional=sage,internet src/sage/combinat/species/library.py src/sage/combinat/tutorial.py
```
gives
```
Doc…
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Output the first 1000 digits of the [Supergolden ratio](https://en.wikipedia.org/wiki/Supergolden_ratio) ψ
[OEIS](https://oeis.org/A092526)
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The continuous fraction field serves no purpose (except being a wrong clone of the rational numbers).
CC: @sagetrac-tmonteil @nathanncohen
Component: **algebra**
Branch/Commit: **[u/vdelecroix/1…
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This patch adds a function `is_vertically_decomposable` to finite lattices.
For testing see https://oeis.org/A058800 ; for example
```
sum([1 for L in Posets(6) if L.is_lattice() and
not LatticeP…
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essentially a lot of missing double colon after EXAMPLES::
found using
```
grep -ozrP --include="*.py" "[A-Z]:\n.*sage: " *
```
CC: @tscrim @jm58660 @kevindilks
Component: **documentation**
Au…
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I'm trying to count solutions using the MiniZinc IDE. This seems like a common desire when considering combinatorial objects. But the MiniZinc Handbook is strangely silent on the topic, except for S…
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Testing with `optional=sage,internet` fails with 14 modules on Sage 6.2 (and before):
| | | |
|---|--------------------|------|
|Nbr|Module and failures |Status|
|1|src/doc…